14 Mar 2025 Airglow and TPs
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Hi Mark,
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TPs are teepees, named as such because in a spectrogram they resemble a Native American teepee. They're the result of the changing ionization state of the F layer(s) affecting the propagation of terrestrial HF band emission. Slides 15 to 23 here: ,%20Typinski%20(2017)%20Slides%20and%20Notes.pdf Here's a paper about the phenomenon: -- Dave On 3/16/25 12:48, Frederick Lehr via groups.io wrote:
On Sat, Mar 15, 2025 at 10:11 AM, Sabine Cremer wrote: |
Sabine Cremer
Dave Typinski